ICD-10 Code H40.119 – Primary open-angle glaucoma, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.119 – Primary open-angle glaucoma, unspecified eye
What it is
This code identifies primary open-angle glaucoma when the affected eye is not specified in the record. It refers to a chronic optic nerve disease with open anterior chamber angles.
Clinical signs
Findings may include optic nerve cupping, visual field loss, and elevated or normal intraocular pressure. Clinical features vary; refer to documentation.
When to use this code
Use H40.119 when the clinician documents primary open-angle glaucoma but does not identify the right or left eye. It is appropriate for confirmed glaucoma diagnoses in outpatient, inpatient, or specialist notes. If the record later specifies the eye, code to the more detailed option.
Do not use for
Do not use this code for glaucoma types other than primary open-angle glaucoma, such as angle-closure or secondary glaucoma. Do not use it when the documentation clearly names a specific eye.
Coding tip
Check the assessment and problem list for laterality before assigning the unspecified-eye code.